Projection apparatus.



PATENTED JAN. 21, 1908.

U. BLATTER.' PROJECTION APPARATUS.

APPLICATION FILED MAY 5, 1906.

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No. 827,041. I PATENTBD JAN. 21, 1908.

U; BLATTBR. PRoJEcTIoN APPARATUS. APPLICATION FILED MAYG. 1906.

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UNITED STATES PATENT oEEIoE.

ULRICH BLTTER, OF- BOSTON,IMASSACHUSETTS,ASSIGNOR TO L. E. KNOTT PPARATUS COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PROJE CTION APPARATUS.

Specification of Letters Patent.

Patented Jan. 21, 1908.

j Application filed May 5. 1906. Serial No. 315.302-

T o all whofmwitmay concern.'

Be it known that l, U muon BLATTER, a citizen of the United States, residing at Boston, county of Suffolk, and State of Massachusetts, have invented an ln'iprovement in Projection Apparatus, of which the follows ing descriptioinin connection with the accompanying drawing, is a speciiication, like letters on 'the drawings representing like parts.

This invention relates to projection apparatus, and it has' for its object to provide a novel means for supporting the object Whose image is to be projected. y

The invention is herein shown as cmbodied in projection apparatus of the type shownvin the Wynne patent No. 803,385, dated October 31, 1905, though l wish it understood that it may be embodied in projection apparatus of other types. The projection apparatus illustrated and described v1n said patent is adapted for either opaque or transparent projection, and when used as 'an opaqueprojcction apparatus, the rays from the source of illumination are reflected onto the object whose image is to be projected by a combined illuminating and erectin dr mirror, said mirror operating not'only to reect onto the object the illuminating rays, but also acting to reiiect toward the objective light rays reflected from the object.A

The table on which the object to be projected is supported is arranged horizontally so that books, vessels containing Water or Vother liquids, or any other object the image of Which it is desired to project, may be readily placed and supported thereon. The combined illuminating and erecting mirror is so disposed as to reflect onto this horizontal table the beam of light emanating from the source of illumination, and then to reflect toward the objective light rays which are reflected from the illuminated object. In accordance with my invention, l make this table capable` of adjustment toward and from the combined illuminating and erecting mirror. 'The adjustment of this table accomplishes two functions. In the first place, it ermits the table to be moved sufci'ently elow said mirror so as to permit the objectto be readily placed thereon, and in the second place, it permits me to focus the image on the screen by simply adjusting the.

table to bring the Vobject into the proper position relative to the mirror. j

vOne embodiment of my invention will first be described and then the novel features thereof will be pointed out in the a pended claims.'

ln the drawings, Figure l is a rear view of a projection apparatus, such as shown in said Wynne patent having my improvement applied thereto: Fig. 2 is a vertical section through my improved table and the combined illuminating and erecting mirror:

Fig. 3 is a detail of the holder for cards and similar llat opaque objects, and Fig. 4 is a section on thc line :1x-, Fig. '3.

As stated above, this invention is designed as an improvement on the projection apparatus shown in said W'ynne patent, an relates solely to the support for the opaque j the objective the light rays reected from the j object.. -1 j 5 designates theI table on which the opa ue objectI is supported, and this table is capa le of adjustment toward and from the mirror 4. The adjustment of said table may be effected in any suitable way without altering the invention, and as a sim le means, l have shown said table as rovi ed with a stem 6 which extends throng a holder 7 that acts as a means to guide the stem in its movement.

The lower end of said stem is pivoted to an operating lever 8 'which in turn 1s lvot'ed to a fixed sup ort, as at 9. With t s construction it be seen that by turning the operating lever 8 about its pivot 9, the table 5 may be adjusted vertically mto any desired position.

Any suitable means may be em loyed for holding the table in its adjuste position, and' as a sim le means for this purpose I have provide suflicient frictiona contact betweenjthe holder 7 and the stem 8 to hold the table in any adjusted position. The stem is made of a sizeY to iit snugly 1n the tubular holder, anda set-screw may' be employed if desired to furnish sufficient friction to hold the stem in its adjusted position. The stem is shown as ha a pro- 'ection 11 exten therefrom whic works in, a slot 12 inthe older, thus furnishing a I suitablemeans for the stem in its e awingssowa oer13 mounted on the table. This ho der is especially designed for receiving or holding cards or other Hat objects that are to be projected. It is herein shown as long enough to support two objects, and'as slidably mounted on the table. Said holder 13 has at one side a Y flange 14 rovided with a lip 15 to be receivedun erali 16 formed on the table 5, and the other. side has a ilange 18 which overliesl theedge -of the table. These anges guide the holder 13 in itsA longitudinal movement. lEach end of the holder 13 is provided with a projection 19 which is adapted to abut the end of thetable, as shown in Fig. 1, and thus to limit sliding movement. n v

20 designate flaps hinged to the holder 13 -and adapted to receive under them the card or other flatl opaque object. These flaps are preferably cut out in their center, as shownin Fig. .2, so as to expose the rtion of the card or the lat object which 1s to be projected, said flap 'be' merely for the paurpose of holding .the car in sh be' lii' h'iiilges ps are own as mg yie e to the holderso as to accommodateycards of different thicknesses. Referring Figs. 3 and 4, it be seen that the flaps are to spring membersA 30 which are carried y the holder and which yield somewhat when y, the flap is folded downonto-th'e holder. this way, the flaps' are firmly- Prs'ed tthe cards'or other iat objectsand old them irml in lace. Theholder 13 maybe "shifted from the full I on thescreen, and during this time eac new Y 'card may vbe -placed under the flap a't the A then be shiftedinto the dotted line to the dotted line in the full-line position, the car at the lefthand end of said holder. may be pro'ected right-end of the holder. The holder 13 may to bring the new card into ition neath the mirror Y In case a boo or other ob'ec't is to be lperojected. on the screen, the ho der 13 will removed from-the tableand a bookor other object laid directly on the '-table Whenever the object on the table into the dotted line is to be changed, said table may be moved position F 1 by dep' the leverv 8, and after t e new object has been placed on the table' it may he raised-into position izo-correctly' position the surface of the object with relation to the mirror 4.',

The focusing of the image my be newmnoW to.

position, F' .1.' When ition plished by'vertically adjusting thetable 5 inis done in most rejection ap aratus.

Making the ta le 5,vert ica y adjustable, therefore, accomplishes two purposes, iirst, it ermits the table to-be lowered sufficiently below the mirror 4 so as to permit objects of any kind to be placed thereon, and second, .it furnishes a means for quickly and readily focusing the image by the same movement position.

as herein shown, no se arate motion, is required to lock or unloc 'the table, and the table will be automatically held-in'whatever position it is left.

thetable 5 longitudinally as well asvertically. For this purpose the holder 7 is cartained by the table 60 that' supports the projection apparatus 3., For'gthis pur ose the table 60 as the bracket 31 secure thereto in which said foot 29 is mounted for horiobject, which' means mc -rect light rays on to said object, of an objecter through which said stempasses, and yan operatin said stem beo ering the latter. l

2. In a projection apparatus, the combinationwith means to project the image of an object, which means includes means to direct light rays on to said object, of an objectlupporting table having a stem 6, a tubular lever pivotally connected' to an v operatin lever pivotally connected' to said stem be ow thetable for raising and lowmcans for frictionallyholding* the tablein any adjusted venting said ta lefronLt 3. In a rojection apparatus, the combination wit 1 means to project the image of al1-object, which means includes means to zontally-mljustahle bracket having a tubular Lholder, a horizontal object-supporting table that brings the table back into its proper" wthe'table for raising and loW-.

steadof manipulating the objectivelens as i yWhere the table is held iti-place by friction, f

vI have also provided herein for adjusting.

rid by a foot 29, which is adjustably suszontal adjustment, said foot being held in v connection with projectionapparatus of 1. In a projection apparatus, the combination with means ,to project.` the image of an t its udes means to d1-v supiorting table having a stem', a tubular v ho er through which said stem passes, and

ering the latterz said tubular holder having osition, and means'V for prei direct light rays on' to said object, of a'horihavino a stem extending through said tubular holder, and a lever pivotally connected to the bracket and to the stem for vertically adjusting the table.

4. In a projection apparatusythe combination with means-to project the image of an `0b ect, which means includes moans `to direct and to the stem for vertically adjusting' theA table, and an object holder slldably mounted on the table and having provision for sustain- 15 ing a plurality of objects. I

In testimony whereof,- I havesigned my name to this specification, in the presence of two subscribing Witnesses.

ULRICH BLA'ITER.

Vitnesses: I

N EWELL D; PARKER, L. E. KNo'rT. 

